Sales of Company X, Jan. 1965 to May 1971                                       
#Reference: Chatfield, C. and Prothero, D.L. (1973).
#Box-Jenkins seasonal forecasting: problems in a case-study
#Journal of the Royal Statistical Society A, Vol. 136, pp.295--336		
 154.  96.  73.  49.  36.  59.  95. 169. 219. 278. 298. 245. 200. 118.          
  90.  79.  78.  91. 167. 169. 289. 347. 375. 203. 223. 104. 107.  85.          
  75.  99. 135. 211. 335. 460. 488. 326. 346. 261. 224. 141. 248. 145.          
 223. 272. 445. 560. 612. 467. 518. 404. 300. 210. 196. 186. 247. 343.          
 464. 680. 711. 610. 613. 392. 273. 322. 189. 257. 324. 404. 677. 858.          
 895. 664. 628. 308. 324. 248. 272.                                             
